The text on the home page as follows is set in the Lucida Grande font, not the Ubuntu font:

The Ubuntu Developer Summit is the seminal Ubuntu event in which we define the focus and plans for our up-coming version of Ubuntu. The event pulls together Canonical engineers, community members, partners, ISVs, upstreams and more into an environment focused on discussion and planning.

Don’t forget to register for UDS.
Community members can apply for sponsorship from Canonical.
The Ubuntu Developer Summit has four primary focal points: